Multifunctional hot melt adhesive tape vertical thrust test fixture
A multi-functional test fixture for HAF adhesive tapes addresses inefficiencies in existing testing methods by offering a cost-effective and reliable evaluation of adhesive tapes through interchangeable components and realistic simulation.
Patent Information
- Application Number
- CN202421289016.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The prior art lacks simple, efficient and reliable hot melt tape vertical thrust testing fixtures, and cannot scientifically evaluate the adhesion of adhesive materials, and is costly or has poor repeatability.
A multifunctional hot melt tape vertical thrust test fixture is designed, including the upper fixture and the lower fixture and sample fixture. Vertical thrust is applied through the push rod or puncture needle, and tested in combination with a universal testing machine. It is suitable for the combination of different substrates to simulate actual bonding and support the puncture resistance test of film materials.
It has achieved efficient and low-cost thrust testing of adhesive materials, good repeatability, comply with existing test standards, and is suitable for actual adhesiveness evaluation of various materials, especially puncture resistance testing of film materials.
Smart Images
Figure CN223107584U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of film material testing devices, and particularly refers to a multifunctional vertical thrust testing fixture for hot melt tapes. Background Art
[0002] With the rise of intelligent wearable electronic devices, such as sports watches, action cameras, VR glasses, etc., more and more have come into our view. In addition to the basic waterproof requirement, such electronic products also have corresponding requirements for solvent resistance and chemical corrosion resistance. Since the sprayed perfume and the sweat secreted by the human body may affect the performance of the device, coupled with the complexity of the device itself in design, the requirement for adhesion will be more and more stringent. Ordinary pressure-sensitive adhesives can no longer meet various bonding requirements, while hot melt adhesives (HAF tapes) can effectively solve these problems.
[0003] The full English name of the HAF hot melt tape is Heat Activated Film, which is a thermosetting adhesive and is also called a thermo-reactive tape. Generally, the hot melt tape does not have adhesiveness at room temperature, and the reactive adhesive layer will only be activated and take effect when a specific temperature and bonding pressure are applied. After the reaction, the hot melt adhesive can effectively resist the corrosion of gasoline and chemical substances and will not fail to bond even in a high-temperature environment.
[0004] The HAF tape can be used for structural bonding of narrow-area fitting, bonding of camera windows, bonding of metal decorative parts, FPC fitting, button fixing, and bonding of speaker meshes, and has a very wide range of applications. In actual applications, the HAF tape is often die-cut into products with very small sizes and various shapes for bonding different parts and different materials in electronic products. In order to evaluate the actual adhesive force of the components, it is usually necessary to test the vertical thrust of the HAF adhesive tape to determine whether it meets the requirements of actual applications. However, for the test of the vertical thrust of the HAF adhesive tape, there is currently no simple and efficient testing fixture and testing method. The existing solutions are all designed for special applications, either too complex, costly, with a narrow application range, or with poor repeatability, low efficiency and low reliability, and cannot simply, efficiently and scientifically evaluate the vertical thrust of adhesive materials. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a multifunctional vertical thrust testing fixture for hot melt tapes.
[0006] The technical solution adopted by the present utility model is as follows: A multifunctional hot-melt tape vertical thrust test fixture, which includes an upper fixture, a lower fixture, and a sample fixture. Among them, the upper fixture includes an upper fixture body and a push rod detachably connected to the upper fixture body. The upper end of the upper fixture body has an upper jack for connecting to a testing machine, and an upper locking hole is provided on the side wall of the upper jack. The lower end of the upper fixture body has a threaded hole for connecting to the push rod. The lower fixture includes a lower fixture body. The bottom of the lower fixture body has a lower jack for connecting to a testing machine, and a lower locking hole is provided on the side wall of the lower jack. The top of the lower fixture body is provided with a fixture positioning concave surface, and a hollow part is also provided inside the lower fixture body. A communicating central hole is provided between the hollow part and the middle of the fixture positioning concave surface, and the diameter of the central hole is larger than the diameter of the push rod. The sample fixture includes an upper bonding substrate and a lower bonding substrate. The upper bonding substrate has a shape corresponding to the fixture positioning concave surface, and an upper through hole for the push rod to pass through is provided on the upper bonding substrate. The outer diameter of the lower bonding substrate is smaller than the diameter of the central hole and larger than the diameter of the upper through hole.
[0007] Further, the upper fixture further includes a thorn needle that can replace the push rod.
[0008] Further, the test fixture further includes a sample making fixture. The sample making fixture has a sample making substrate in an "H" shape, and a first sample making concave surface matching the shape of the upper bonding substrate is formed on the sample making substrate.
[0009] Further, a second sample making concave surface is also formed in the middle of the first sample making concave surface of the sample making substrate. The shape of the second sample making concave surface matches the shape of the lower bonding substrate, and the depth of the second sample making concave surface is slightly smaller than the thickness of the lower bonding substrate, so that the surface of the lower bonding substrate protrudes for press-fitting and bonding.
[0010] Further, finger position concave surfaces are provided on both sides of the fixture positioning concave surface of the lower fixture body.
[0011] Further, both ends of the hollow part of the lower fixture body communicate with the outside.
[0012] Further, the fixture positioning concave surface and the upper bonding substrate are square, and the lower bonding substrate is circular.
[0013] Compared with the prior art, the present utility model has the following advantages:
[0014] (1) The fixture has a simple structure and low cost, and is well matched with a universal testing machine. It can be combined with specific substrate types, and can simulate the thrust test between actual bonding substrates to the greatest extent;
[0015] (2) The test efficiency is high and fast. Multiple specimens can be quickly prepared through the sample preparation fixture. In addition, the upper fixture can be quickly replaced with a piercing needle, which is applied to the puncture resistance test of thin film materials and can be widely applicable to fields such as lithium battery materials, fuel cell materials, and filtration equipment that need to investigate the puncture resistance performance of thin films.
[0016] (3) The test method is simple and has good repeatability, meeting the technical requirements of existing test standards. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is the front view plane structure schematic diagram of the test fixture of the present utility model;
[0018] Figure 2 is the top view plane structure schematic diagram of the lower fixture of the present utility model;
[0019] Figure 3-1 、 Figure 3-2 are respectively the top view and front view of the upper bonding substrate of the present utility model;
[0020] Figure 4-1 、 Figure 4-2 are respectively the top view and front view of the lower bonding substrate of the present utility model;
[0021] Figure 5-1 、 Figure 5-2 are respectively the top views of the sample preparation fixtures of two embodiments of the present utility model.
[0022] Figure 6-1 、 Figure 6-2 is the effect diagram when the fixture of the present utility model is testing;
[0023] Figure 7 is the plane schematic diagram of the piercing needle of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] As Figures 1-6-2As shown in the figure, the multi-functional hot-melt tape vertical thrust test fixture of the present utility model includes an upper fixture 1, a lower fixture 2, and a sample fixture. Among them, the upper fixture 1 includes an upper fixture body 11 and a push rod 12 detachably connected to the upper fixture body 11. Among them, the upper end of the upper fixture body 11 has an upper jack 111 that can be connected to a testing machine, and an upper locking hole 112 is provided on the side wall of the upper jack 111 for locking and positioning with a locking screw; the lower end of the upper fixture body 11 has a threaded hole 113 connected to the push rod 12, and the upper end of the push rod 12 has an external thread corresponding to the threaded hole 113; the lower fixture 2 includes a lower fixture body 21, and the bottom of the lower fixture body 21 has a lower jack 211 that can be connected to a testing machine, and a lower locking hole 212 is provided on the side wall of the lower jack 211. A fixture positioning concave surface 213 is provided on the top of the lower fixture body 21, and a hollow part 214 is further provided inside the lower fixture body 21. A communicating central hole 215 is provided between the hollow part 214 and the middle of the fixture positioning concave surface 213, and the diameter of the central hole 215 is larger than the diameter of the push rod 12 for the push rod 12 to pass through during testing; the sample fixture includes an upper bonding substrate 31 and a lower bonding substrate 32. The upper bonding substrate 31 has a shape corresponding to the fixture positioning concave surface 213, and the upper bonding substrate 31 is provided with an upper through hole 311 for the push rod 12 to pass through. The outer diameter of the lower bonding substrate 32 is smaller than the diameter of the central hole 215 and larger than the diameter of the upper through hole 311.
[0025] When performing a thrust test, the double-sided tape sample to be tested is used as an adhesive layer and bonded to the upper surface of the lower bonding substrate 32 and bonded to the periphery of the upper through hole 311 of the upper bonding substrate 31 from below, covering the upper through hole 311 from below. If the double-sided tape to be tested is a hot-melt tape, the production of the bonded sample is further completed by hot pressing; the sample fixture containing the double-sided tape to be tested is placed in the fixture positioning concave surface 213 of the lower fixture body 21 and automatically positioned; then the push rod 12 of the upper fixture 1 moves downward through the upper through hole 311 of the upper bonding substrate 31 to generate a downward thrust on the double-sided tape. When the thrust of the push rod 12 causes the double-sided tape to separate from the upper bonding substrate 31, the thrust recorded by the testing machine can evaluate the vertical thrust and adhesion of the double-sided tape.
[0026] Further, as Figure 7 shown, the upper fixture 1 further includes a thorn needle 13 that can replace the push rod 12 and is used during a puncture test.
[0027] Further, as Figure 5-1 、 Figure 5-2As shown in the figure, the test fixture further includes a sample making fixture 4. The sample making fixture 4 has a sample making substrate 41 in an "H" shape. A first sample making concave surface 411 matching the shape of the upper bonding substrate 31 is formed on the sample making substrate 41. In this embodiment, the sample making substrate 41 is applicable to the samples for puncture test, that is, its sample fixture is formed by laminating two upper bonding substrates 31 with upper through holes 311. The tape to be tested is clamped between the two upper bonding substrates 31 and exposed at the upper through holes 311, and cooperates with the puncture needle 13 of the upper fixture 1 for puncture test.
[0028] Further, a second sample making concave surface 412 is also formed in the middle of the first sample making concave surface 411 of the sample making substrate 41. The shape of the second sample making concave surface 412 matches the shape of the lower bonding substrate 32, and the depth of the second sample making concave surface 412 is slightly smaller than the thickness of the lower bonding substrate 32, so that the surface of the lower bonding substrate 32 protrudes for press-fitting and bonding. In this embodiment, the shape of the lower bonding substrate 32 is circular, so the second sample making concave surface 412 has a positioning arc corresponding to the lower bonding substrate 32. When making the sample for thrust test, after bonding the lower bonding substrate 32 to the tape, it is placed in the second sample making concave surface 412 for positioning, with the tape facing up. Then the upper bonding substrate 31 is positioned and pressed on the tape through the first sample making concave surface 411, and the whole is taken out to complete the production of the sample for thrust test, and cooperates with the push rod 12 of the upper fixture 1 for thrust test.
[0029] Further, finger concave surfaces 216 are provided on both sides of the fixture positioning concave surface 213 of the lower fixture body 21, which is convenient for taking and placing the test sample by hand.
[0030] Further, both ends of the hollow part of the lower fixture body 21 communicate with the outside, so as to take out the lower bonding substrate that falls during the thrust test.
[0031] Further, the fixture positioning concave surface 213 and the upper bonding substrate 31 are square, and the lower bonding substrate 32 is circular.
[0032] To sum up, compared with the prior art, the present utility model has the following advantages:
[0033] (1) The fixture has a simple structure and low cost, and is well matched with the universal testing machine. It can be combined with specific types of base materials, and can simulate the thrust test between actual bonding base materials to the greatest extent.
[0034] (2) The test efficiency is high and fast, and multiple test pieces can be quickly prepared through the sample making fixture. In addition, the upper fixture can be quickly replaced with a puncture needle and applied to the puncture resistance test of film materials. It can be widely applied to fields such as lithium battery materials, fuel cell materials, and filtration equipment that need to investigate the puncture resistance performance of films.
[0035] (3) The test method is simple and has good repeatability, meeting the technical requirements of existing test standards.
[0036] The above embodiments are only exemplary embodiments adopted for explaining the principle of the present utility model, however, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.
Claims
1. A multifunctional hot melt tape vertical thrust test fixture, characterized in that: It includes an upper jig, a lower jig, and a sample fixture. Among them, the upper jig includes an upper jig body and a push rod detachably connected to the upper jig body. The upper end of the upper jig body has an upper jack for connecting to a testing machine, and an upper locking hole is provided on the side wall of the upper jack. The lower end of the upper jig body has a threaded hole for connecting to the push rod. The lower jig includes a lower jig body. The bottom of the lower jig body has a lower jack for connecting to a testing machine, and a lower locking hole is provided on the side wall of the lower jack. A fixture positioning concave surface is provided at the top of the lower jig body, and a hollow part is also provided inside the lower jig body. A communicating central hole is provided between the hollow part and the middle of the fixture positioning concave surface, and the diameter of the central hole is larger than the diameter of the push rod. The sample fixture includes an upper bonding substrate and a lower bonding substrate. The upper bonding substrate has a shape corresponding to the fixture positioning concave surface, and an upper through hole for the push rod to pass through is provided on the upper bonding substrate. The outer diameter of the lower bonding substrate is smaller than the diameter of the central hole and larger than the diameter of the upper through hole.
2. The vertical thrust test fixture for the multifunctional hot melt tape according to claim 1, wherein: The upper jig further includes a stylet that can replace the push rod.
3. The vertical thrust test fixture for the multifunctional hot melt tape according to claim 1 or 2, characterized in that: The test jig further includes a sample making jig. The sample making jig has a sample making substrate in an "H" shape, and a first sample making concave surface matching the shape of the upper bonding substrate is formed on the sample making substrate.
4. The vertical thrust test fixture for the multifunctional hot melt tape according to claim 3, characterized in that: A second sample making concave surface is further formed in the middle of the first sample making concave surface of the sample making substrate. The shape of the second sample making concave surface matches the shape of the lower bonding substrate, and the depth of the second sample making concave surface is slightly smaller than the thickness of the lower bonding substrate, so that the surface of the lower bonding substrate protrudes for press bonding.
5. The vertical thrust test fixture for the multifunctional hot melt tape according to claim 1, wherein: Finger position concave surfaces are provided on both sides of the fixture positioning concave surface of the lower jig body.
6. The multi-functional hot melt tape vertical thrust test fixture according to claim 1, characterized in that: Both ends of the hollow part of the lower jig body communicate with the outside.
7. The vertical thrust test fixture for the multifunctional hot melt tape according to claim 1, wherein: The fixture positioning concave surface and the upper bonding substrate are square, and the lower bonding substrate is circular.